Cisco Catalyst 3750 User Manual

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Catalyst 3750 Switch Command Reference
OL-8552-07
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
speed
speed
Use the speed interface configuration command to specify the speed of a 10/100 Mb/s or
10/100/1000
Mb/s port. Use the no or default form of this command to return the port to its default
value.
speed {10 | 100 | 1000 | auto [10 | 100 | 1000] | nonegotiate}
no speed
Syntax Description
Defaults The default is auto.
Command Modes Interface configuration
Command History
Usage Guidelines You cannot configure speed on the 10-Gigabit Ethernet ports.
Except for the 1000BASE-T SFP modules, if an SFP module port is connected to a device that does not
support autonegotiation, you can configure the speed to not negotiate (nonegotiate).
If the speed is set to auto, the switch negotiates with the device at the other end of the link for the speed
setting and then forces the speed setting to the negotiated value. The duplex setting remains as
configured on each end of the link, which could result in a duplex setting mismatch.
If both ends of the line support autonegotiation, we highly recommend the default autonegotiation
settings. If one interface supports autonegotiation and the other end does not, do use the auto setting on
the supported side, but set the duplex and speed on the other side.
Caution Changing the interface speed and duplex mode configuration might shut down and re-enable the
interface during the reconfiguration.
10 Port runs at 10 Mb/s.
100 Port runs at 100 Mb/s.
1000 Port runs at 1000 Mb/s. This option is valid and visible only on 10/100/1000
Mb/s-ports.
auto Port automatically detects the speed it should run at based on the port at the other
end of the link. If you use the 10, 100, or 1000 keywords with the auto keyword, the
port only autonegotiates at the specified speeds.
nonegotiate Autonegotiation is disabled, and the port runs at 1000 Mb/s. (The 1000BASE-T SFP
does not support the nonegotiate keyword.)
Release Modification
12.1(11)AX This command was introduced.
12.2(20)SE1 Support for the 10, 100, and 1000 keywords with the auto keyword was added.

Cisco Catalyst 3750 Specifications

General

Device Type	Switch
Switching Capacity	32 Gbps
Forwarding Rate	38.7 Mpps
Stacking Bandwidth	32 Gbps
RAM	128 MB
Jumbo Frame Support	Yes
Switch Type	Managed
Model	Catalyst 3750 Series
Uplink Interfaces	SFP
Form Factor	Rack-mountable
MAC Address Table Size	12, 000 entries
Routing Protocol	RIP, OSPF, EIGRP
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Layer 3 switching, Layer 2 switching, auto-negotiation, BOOTP support, ARP support, VLAN support, auto-uplink (auto MDI/MDI-X), IGMP snooping, traffic shaping, MAC address filtering, Quality of Service (QoS), Jumbo Frames support, MLD snooping, Dynamic ARP Inspection (DAI), Cisco EnergyWise technology
Power over Ethernet (PoE)	PoE
Operating Temperature	-5 - 45 °C
Operating Humidity	10% to 85% non-condensing